Band-pulley



(No Model.)

R. J ONES.

BAND PULLEY. No. 326,873. Patented Sept. 22; 1885.

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'REUBEN JONES, OF ATLANTA, GEORGIA.

BAN D-PULLEY.

SPECIFICATION forming part of Letters Patent No. 326,873, dated September 22, 1885. Application led August 5, 18H5. (No model.)

To all whom t may concern:

Be it known that I, REUBEN JONES, a citizen of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, have invented a new and useful Improvement in Band-Pulleys, of which the following is a description.

Figure l is an edge view of a portion of the pulley. Fig. 2 is a side view of the same, and Figs. 3 and 4 are perspective views from the inside of the two similar halves of the pulley.

My invention relates to band-pulleys which are designed to carry a rope belt; and it consists in such peculiar construction and arrangement of parts as cause it to take a better hold on the rope to prevent slipping and adapt it to different sizes of rope, as well as facilitate the construction of the pulley, as hereinafter fully described.

In the drawings, A A represent the pulley, which is made in two parts joined together in parallel planes and secured by bolts a, that pass through elongated holes or slots b. These two pulley-sections are exact duplicates of each other, and are cast in the saine mold. They comprehend a peripheral rim, c, a set of radially-projecting triangular teeth, d, and a peripheral iiange or at ring, e, at the apeX of said teeth. rIhese two pulleysections, when laid flat together and fastened by the bolts a, forni a groove between the peripheral flanges and the teeth that receives the rope belt. In fastening the two pulleysections together the teeth d of one section are directly opposite the teeth d of the other section; but the adjacent faces of the teeth (which constitute the hypotenuse of the rightangle triangle of their cross section) are arranged obliquely or diagonally to the plane of the pulley, which causes the rope as it passes between the teeth at this point vto be crimped or bent into a diagonal position, which causes it to bindagainst the sharp corner of one of the teeth, whether pulling in a forward or backward direction. These teeth at their base are the full width of the peripheral rim, and at their apices they taper to the plane of the fiat peripheral ring or iiange.

The object of the slots b, through which the bolts pass that fasten the two sections together, is to allow one section to be slightly turned on the other, so as to adjust the teeth of the sections to or from each other to form a narrower or wider passage-way between them, thus adapting the pulley to tightly hold different sizes of rope.

Now, in dening my invention with greater clearness, I will state that I am aware that a band-pulley has heretofore been constructed of two flat sections having beveled and serrated edges, whieh forni a notched groove when placed together, as shown in Patent No. 26,707 5 and I am aware that a pulley-wheel has been constructed in one piece, with diagonal notches to receive a rope belt, as shown in Patent No. 300,411, and I do not claim either of these features broadly. The distinctive features of my invention consist in a sectional pulley having teeth at its edges inclined in opposite directions, which enables both sections of the pulley to be cast in the same mold, and also forms a diagonal crimp in the rope between the teeth, and gives one sharp edge or acute angle for the rope to catch against, no matter whether moving forward or backward, thus most elfectually preventing the rope from slipping and simplifying the construction of the pulley, and also further in the axial adjustment of the sections, which adapts the pulley-teeth to ditferent sizes of rope belts.

Having thus described my invention, what I claim as new is l. A band-pulley consisting of two parallel sections having a series of triangular teeth at their edges, with the adjacent faces of the teeth on the opposite sections arranged parallel to each other and diagonally to the plane of the pulley, whereby both sections may be east in the same mold, and a sharp edge or acute angle of one set of teeth is presented to the rope in moving in either direction, as described.

2. A band-pulley each with a peripheral rim, having triangular teeth extending across the rini at their bottoms, and flat peripheral rings or flanges at the apices of said teeth, the said sections being bolted together, as described.

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3. A band-pulley made in two fiat sections having peripheral rim with teeth, 'as described, thesaid sections being provided with elongated holes and bolts to permit an axial adjustment of one section over the other to adapt the pulley to different sizes of rope, substantially as shown and described.

The above specification of my invention signed by me in the presence .of two subscribing Witnesses.

' REUBEN JONES.

Witnesses:

SoLoN C. KEMON, CHAS. A. PETTIT.- 

